B. Identify the underlined part that makes the sentence incorrect, 4. I(1) was wondering where(2) had your son gone after he(3) returned home(4) from school yesterday. 5. My supervisor(1) suggested that I(2) worked harder(3) on my project and he promised(4) to promote me next year. 6. Tomorrow, my brother(l) is going to take his car to the garage because he(2) is hearing some(3) strange sound(4) coming from the engine. My school PSU